CN113966606B - Camera device - Google Patents

Camera device Download PDF

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Publication number
CN113966606B
CN113966606B CN202080043313.9A CN202080043313A CN113966606B CN 113966606 B CN113966606 B CN 113966606B CN 202080043313 A CN202080043313 A CN 202080043313A CN 113966606 B CN113966606 B CN 113966606B
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CN
China
Prior art keywords
coil
camera device
hall sensor
magnet
disposed
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Active
Application number
CN202080043313.9A
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Chinese (zh)
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CN113966606A (en
Inventor
具本锡
金昶年
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LG Innotek Co Ltd
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LG Innotek Co Ltd
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Publication of CN113966606A publication Critical patent/CN113966606A/en
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
    • H04N23/682—Vibration or motion blur correction
    • H04N23/685—Vibration or motion blur correction performed by mechanical compensation
    • H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/04—Vertical adjustment of lens; Rising fronts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/035—DC motors; Unipolar motors
    • H02K41/0352—Unipolar motors
    • H02K41/0354—Lorentz force motors, e.g. voice coil motors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
    • H04N23/681—Motion detection
    • H04N23/6812—Motion detection based on additional sensors, e.g. acceleration sensors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N52/00—Hall-effect devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N52/00—Hall-effect devices
    • H10N52/80—Constructional details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G03B2205/0015—Movement of one or more optical elements for control of motion blur by displacing one or more optical elements normal to the optical axis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils

Abstract

The camera device according to the present embodiment includes: a first operation portion including one of a first coil or a magnet and disposed on the fixing member; a second operation portion including the other of the first coil and the magnet, and disposed on the movable member and facing the first operation portion; a hall sensor facing one of the first operation portion and the second operation portion; and a second coil disposed in the vicinity of the hall sensor, wherein at least a portion of the second coil is disposed between the hall sensor and the first coil.

Description

Camera device
Technical Field
The present invention relates to a camera device.
Background
The following description provides background information for the present embodiment, rather than describing the prior art.
With the wide spread of various portable terminals and commercialization of wireless internet services, consumer demands related to portable terminals are also diversified, so that various types of additional devices are installed in the portable terminals.
Among them, there is a camera module for taking an object as a photograph or a moving picture. Meanwhile, an auto-focusing function for automatically adjusting a focus according to a distance of an object is applied to the nearest camera module. In addition, a hand shake correction function of preventing an image from being shaken by a camera's hand shake is also applied.
Meanwhile, a Voice Coil Motor (VCM) is used to apply an auto-focus function or a hand-shake correction function. Voice coil motors use electromagnetic interactions between magnets and coils. At this time, the movement of the magnet is sensed by the hall sensor.
However, there is a problem in that the measurement sensitivity of the hall sensor is lowered due to the influence of the coil.
Disclosure of Invention
Subject matter of the technology
The invention aims to provide a camera device capable of improving the measurement sensitivity of a Hall sensor.
Technical proposal
A camera apparatus according to an aspect of the present invention for achieving the above object includes: a first driving unit including one of a first coil or a magnet and disposed on the fixing member; a second driving unit including the other of the first coil and the magnet, and disposed on the movable member and facing the first driving unit; a hall sensor facing one of the first driving unit and the second driving unit; and a second coil disposed at a periphery of the hall sensor, wherein at least a portion of the second coil is disposed between the hall sensor and the first coil.
A camera apparatus according to an aspect of the present invention for achieving the above object includes: a first driving unit including one of a first coil or a magnet and disposed on the fixing member; a second driving unit including the other of the first coil or the magnet, and disposed on the movable member and facing the first driving unit; a hall sensor facing one of the first driving unit and the second driving unit; and a second coil provided on one of the fixed member or the movable member, wherein the second coil is provided to overlap a central region of the first coil in a first direction perpendicular to the optical axis, and wherein at least a portion of the hall sensor is provided to overlap the central region of the second coil in the first direction.
A camera apparatus according to an aspect of the present invention for achieving the above object includes: a first coil provided on the fixing member; a magnet provided on the movable member and facing the first coil; a hall sensor facing the magnet; and a second coil disposed on the fixing member, wherein the second coil is disposed adjacent to the hall sensor, and wherein a direction of a magnetic field generated by the second coil is opposite to a direction of the magnetic field generated by the first coil.
In addition, the direction of the current flowing through the second coil may be opposite to the direction of the current flowing through the first coil.
In addition, the winding direction of the first coil and the winding direction of the second coil may be opposite to each other.
In addition, the second coil may have a smaller size than the first coil.
In addition, the second coil may be disposed inside the first coil, and the hall sensor may be disposed inside the first coil.
In addition, the first coil may include a first opening formed in the central region, and the second coil may be disposed in the first opening.
In addition, the second coil may include a second opening formed in the central region, and the hall sensor may be disposed at a center of the second opening.
In addition, the thickness of the second coil may be thinner than the thickness of the first coil.
In addition, the fixing member may include a substrate.
In addition, the substrate may include a flexible substrate.
In addition, the second coil may include a fine pattern coil (FP coil).
Advantageous effects
With the present embodiment, a lens module and a camera device in which the measurement sensitivity of a hall sensor is improved can be provided.
Drawings
Fig. 1 is a perspective view of a camera device according to an embodiment of the present invention.
Fig. 2 is a plan view of a camera device according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a camera device according to an embodiment of the present invention.
Fig. 4 is a plan view of a camera device according to another embodiment of the present invention.
Fig. 5 is a cross-sectional view of a camera device according to another embodiment of the present invention.
Fig. 6 is a cross-sectional view of a camera device according to still another embodiment of the present invention.
Fig. 7 is a cross-sectional view of a camera device according to still another embodiment of the present invention.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
However, the technical idea of the present invention is not limited to some embodiments to be described, but may be implemented in various forms, and one or more of the constituent elements may be selectively combined or replaced between the embodiments within the scope of the technical idea of the present invention.
In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless explicitly defined and described, may be construed as meanings that may be commonly understood by one skilled in the art, and commonly used terms, such as terms defined in dictionaries, may be interpreted in consideration of the meanings of the related art.
In addition, the terminology used in the description presented herein is for the purpose of describing embodiments only and is not intended to be limiting of the invention.
In this specification, unless explicitly stated in the phrase, the singular form may include the plural form, and when described as "at least one (or more than one) of A, B and C," it may include one or more of all combinations that can be combined with A, B and C.
In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a) and (b) may be used. These terms are only used to distinguish one element from another element and do not limit the nature, order, or sequence of the elements.
Also, when an element is referred to as being "connected," "coupled," or "interconnected" to another element, it is not only directly connected, coupled, or interconnected to the other element, but may also include instances where "connected," "coupled," or "interconnected" by another member between other members.
In addition, when described as being formed on or disposed on "upper (upper)" or "lower (lower)" of each component, the "upper (upper)" or "lower (lower)" is intended to include not only the case where two components are in direct contact but also the case where one or more other components are formed or disposed between the two components. In addition, when expressed as "upper (upper)" or "lower (lower)", it may include not only a meaning based on an upward direction of one component but also a meaning based on a downward direction of one component.
Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
Fig. 1 is a perspective view of a camera device according to an embodiment of the present invention. Fig. 2 is a plan view of a camera device according to an embodiment of the present invention. Fig. 3 is a cross-sectional view of a camera device according to an embodiment of the present invention.
Referring to fig. 1 to 3, the camera apparatus (10) according to the embodiment of the present invention may include a fixed member, a movable member (not shown), a first driving unit, a second coil (400), and a hall sensor (500), but the camera apparatus (10) may be implemented in configurations other than some of these configurations, and other configurations are not excluded.
The first driving unit may be disposed in the fixing member. The second driving unit is disposed on the movable member and may face the first driving unit. The hall sensor (500) may face one of the first driving unit and the second driving unit. The second coil (400) may be disposed at the periphery of the hall sensor (500). Here, the fixing member may include a base plate (100). One of the first and second drive units may be a first coil (200) and the other may be a magnet (300). The movable member may be movable relative to the fixed member by electromagnetic interaction of the first drive unit and the second drive unit. Thus, an auto-focus function or an image stabilization function can be performed.
The camera device (10) may include a substrate (100). In one embodiment of the present invention, the substrate (100) is described as a fixed member as an example, but is not limited thereto, and the substrate (100) may be a movable member. The first coil (200), the second coil (400), and the hall sensor (500) may be disposed on the substrate (100). The first coil (200), the second coil (400), and the hall sensor (500) may be disposed on a surface of the substrate (100) facing the magnet (300). The substrate (100) may be a Printed Circuit Board (PCB). The substrate (100) may be a Rigid Printed Circuit Board (RPCB). The substrate (100) may be a flexible substrate. The substrate (100) may be a Flexible Printed Circuit Board (FPCB). The substrate (100) may be electrically connected to the first coil (200), the second coil (400), and the hall sensor (500). The substrate (100) may supply power to the first coil (200), the second coil (400), and the hall sensor (500). A control unit (not shown) for supplying power to the first coil (200) and the second coil (400) may be provided on the substrate (100). A control unit for transmitting and receiving signals from the Hall sensor (500) may be provided on the substrate (100).
The camera device (10) may comprise a first coil (200). The first coil (200) may be disposed on the substrate (100). The first coil (200) may be disposed on a surface of the substrate (100) opposite to the magnet (300). The first coil (200) may face the magnet (300). The first coil (200) may be formed in a rectangular bar shape. The first coil (200) may be formed in a ring shape.
The first coil (200) may include a first hollow portion formed in the central region. The second coil (400) and the hall sensor (500) may be disposed in the first hollow portion of the first coil (200). The hall sensor (500) may be disposed in a central region of the first hollow portion of the first coil (200). The first coil (200) may overlap the second coil (400) in a first direction. The central region of the first coil (200) may overlap with the second coil (400) in the first direction. Here, the first direction may be a direction perpendicular to the optical axis. For example, the first direction may be a direction perpendicular to a second direction facing the first coil (200) and the magnet (300). In addition, the central region of the first coil (200) may refer to a first hollow portion of the first coil (200) or may refer to a region smaller than the first hollow portion. The length or thickness of the first coil (200) in the second direction may be greater than the length or thickness of the second coil (400) in the second direction. The length of the first coil (200) in the second direction may be greater than the length of the hall sensor (500) in the second direction. For example, as shown in fig. 3, the first coil (200) may protrude more in the direction of the magnet (300) than the second coil (400) and the hall sensor (500).
The first coil (200) may move a movable member on which the magnet (300) is disposed by electromagnetic interaction with the magnet (300). If the substrate (100) is a movable member, the first coil (200) may be moved by electromagnetic interaction with the magnet (300).
The camera device (10) may include a magnet (300). The magnet (300) may be provided on a movable member (not shown). In the embodiment of the present invention, the magnet (300) is described as being provided on the movable member as an example, but is not limited thereto, and the magnet (300) may be provided on the fixed member. The magnet (300) may face the first coil (200). The magnet (300) may face the second coil (400). The magnet (300) may face the hall sensor (500).
The magnet (300) is movable by electromagnetic interaction with the first coil (200). If the magnet (300) is provided on the fixed member, the magnet (300) may move the movable member on which the first coil (200) is provided by electromagnetic interaction with the first coil (200).
In the embodiment of the present invention, the magnet (300) is described as being formed in a rectangular shape by way of example, but is not limited thereto, and the shape of the magnet (300) may be variously changed.
The camera device (10) may comprise a second coil (400). The second coil (400) may be disposed on the substrate (100). The second coil (400) may be disposed on a surface of the substrate (100) facing the magnet (300). The second coil (400) may face the magnet (300). The second coil (400) may be disposed in the first coil (200). The second coil (400) may be disposed in the first hollow portion of the first coil (200). The second coil (400) may be formed in a rectangular bar shape. The second coil (400) may be formed in a ring shape. The second coil (400) may be disposed between the first coil (200) and the hall sensor (500). At least a portion of the second coil (400) may be disposed between the first coil (200) and the hall sensor (500). The second coil (400) may be disposed at the periphery of the hall sensor (500). The second coil (400) may include a second hollow portion. The hall sensor (500) may be disposed in the second hollow portion of the second coil (400). The hall sensor (500) may be disposed in a central region of the second hollow portion of the second coil (400). The second coil (400) may be disposed adjacent to the hall sensor (500). The central region of the second coil (400) may overlap with at least a portion of the hall sensor (500) in the first direction.
The magnetic field direction of the second coil (400) may face the opposite direction of the magnetic field of the first coil (200). For example, the winding direction of the second coil (400) may be opposite to the winding direction of the first coil (200). In contrast, the current direction of the second coil (400) may be opposite to the current direction of the first coil (100). Referring to fig. 3, a first magnetic force F of the first coil (200) 1 Is directed towards the magnet (300), and a second magnetic force F of the magnet (300) 2 Directed towards the first coil (200). At this time, the second coil (400) is disposed between the first coil (200) and the Hall sensor (500) such that a third magnetic force F of the second coil (400) 3 Pointing in the opposite direction of the magnet (300). That is, the third magnetic force F of the second coil (400) 3 Can be oriented in a direction of a first magnetic force F of the first coil (200) 1 Is opposite to the direction of the (c). Thereby, due to the third magnetic force F of the second coil (400) 3 Counteracts the first magnetic force F of the first coil (200) 1 Therefore, the second magnetic force F of the magnet (300) detected by the Hall sensor (500) can be increased 2 Is a high sensitivity.
The second coil (400) may have a length or thickness in a second direction, e.g. towards the magnet (300), which is greater than the first coil(200) The length or thickness in the second direction is small. The length of the second coil (400) in the second direction may be greater than the length of the hall sensor (500) in the second direction. Thereby, the second magnetic force F of the magnet (300) detected by the Hall sensor (500) 2 Can be increased without disturbing the electromagnetic interaction between the first coil (200) and the magnet (300).
The camera device (10) may comprise a hall sensor (500). The hall sensor (500) may be disposed on the substrate (100). The hall sensor (500) may be disposed on a surface of the substrate (100) facing the magnet (300). The hall sensor (500) may face the magnet (300). The hall sensor (500) can detect the position of the magnet (300).
The hall sensor (500) may be disposed on the first coil (200). The hall sensor (500) may be disposed inside the first coil (200). The hall sensor (500) may be disposed in a central region of the first coil (200). The hall sensor (500) may be disposed on the second coil (400). The hall sensor (500) may be disposed inside the second coil (400). At least a portion of the hall sensor (500) may overlap with a central region of the second coil (400) in the first direction. The hall sensor (500) may be disposed adjacent to the second coil (400). The hall sensor (500) may be disposed in a central region of the second coil (400). The hall sensor (500) may be disposed in the second hollow portion of the second coil (400). The hall sensor (500) may be disposed in a central region of the second hollow portion of the second coil (400). Here, the central region of the second coil (400) may be a second hollow portion, and the central region of the second coil (400) may be smaller than the second hollow portion.
According to the camera device (10) of the embodiment of the present invention, the measurement sensitivity of the magnet (300) can be improved by reducing noise of the hall sensor (500) without a separate additional circuit configuration.
Fig. 4 is a plan view of a camera device according to another embodiment of the present invention. Fig. 5 is a cross-sectional view of a camera device according to another embodiment of the present invention. In the camera device (10) according to another embodiment of the present invention, components having the same reference numerals as those of the camera device (10) according to the embodiment of the present invention may be understood as the same configuration. Hereinafter, a difference of the camera apparatus (10) according to another embodiment of the present invention from the camera apparatus (10) according to the embodiment of the present invention will be described.
The camera device (10) according to another embodiment of the present invention may include a second coil (410). The second coil (410) may be disposed on the substrate (100). The second coil (410) may be mounted on a surface of the substrate (100) facing the magnet (300). The second coil (410) may be a pattern coil (P-coil). The second coil (410) may be a fine pattern coil (FP coil) integrally formed with the substrate (100).
According to the camera device (10) of another embodiment of the present invention, since the second coil (410) is formed of a pattern coil, there is an advantage in that manufacturing costs can be reduced.
Fig. 6 is a cross-sectional view of a camera device according to still another embodiment of the present invention. In the camera device (10) according to still another embodiment of the present invention, components having the same reference numerals as those of the camera device (10) according to the embodiment of the present invention may be understood as the same configuration. Hereinafter, a difference of the camera apparatus (10) according to still another embodiment of the present invention from the camera apparatus (10) according to the embodiment of the present invention will be described.
The camera device (10) may include a substrate (110). The substrate (110) may be a Printed Circuit Board (PCB). The substrate (110) may be a Rigid Printed Circuit Board (RPCB). The substrate (110) may be a flexible substrate. The substrate (110) may be a Flexible Printed Circuit Board (FPCB).
At least a portion of the substrate (110) may be curved. The substrate (100) may include a first region in which the first coil (200) is seated and a second region in which the second coil (400) and the hall sensor (500) are seated. The second region may be formed in a central region of the first region. The second region may be curved in the first region and disposed closer to the magnet (300) side.
The second region may be cut, bent twice in the first region, and disposed in parallel with the first region.
At this time, the surface of the second coil (400) facing the magnet (300) may be disposed on the same plane as the surface of the first coil (200) facing the magnet (300).
According to the camera device (10) of the further embodiment of the present invention, since the hall sensor (500) is closer to the magnet (300), there is an advantage in that the measurement sensitivity of the hall sensor (500) can be further improved.
Fig. 7 is a cross-sectional view of a camera device according to still another embodiment of the present invention. In the camera device (10) according to still another embodiment of the present invention, components having the same reference numerals as those of the camera device (10) according to the embodiment of the present invention may be understood as the same configuration. Hereinafter, a difference of the camera apparatus (10) according to still another embodiment of the present invention from the camera apparatus (10) according to the embodiment of the present invention will be described.
The camera device (10) may include a substrate (120). The substrate (120) may be a Printed Circuit Board (PCB). The substrate (120) may be a Rigid Printed Circuit Board (RPCB). The substrate (120) may be a flexible substrate. The substrate (120) may be a Flexible Printed Circuit Board (FPCB).
The substrate (100) may include a first region in which the first coil (200) is seated and a second region in which the second coil (400) and the hall sensor (500) are seated. The second region may be formed in a central region of the first region. The second region may be curved in the first region and disposed closer to the magnet (300) side. The second region may be disposed parallel to the first region.
The camera device (10) may include a spacer (600). The spacer (600) may be disposed on the other side of the substrate (120). The spacer (600) may include a third region overlapping the first coil (200) in the second direction and a fourth region overlapping the second coil (400) in the second direction. The fourth region of the spacer (600) may protrude toward the magnet (300) more than the third region.
At this time, the surface of the second coil (400) facing the magnet (300) may be disposed on the same plane as the surface of the first coil (200) facing the magnet (300).
According to the camera device (10) of the further embodiment of the present invention, since the hall sensor (500) is closer to the magnet (300), there is an advantage in that the measurement sensitivity of the hall sensor (500) can be further improved.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but it will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features. Accordingly, it should be understood that the above-described embodiments are illustrative in all respects and not restrictive.

Claims (46)

1. A camera apparatus, comprising:
a first driving unit including one of a first coil and a magnet and disposed on the fixing member;
a second driving unit including the other of the first coil and the magnet, and provided on the movable member and facing the first driving unit;
a hall sensor facing the magnet; and
a second coil disposed around the hall sensor,
wherein at least a portion of the second coil is disposed between the hall sensor and the first coil,
wherein the fixing member comprises a base plate,
wherein the first coil, the second coil and the Hall sensor are arranged on the substrate,
wherein the substrate includes a first region provided with the first coil and a second region provided with the second coil and the hall sensor, an
Wherein the distance between the second region and the magnet is smaller than the distance between the first region and the magnet.
2. The camera device of claim 1, wherein a direction of current flowing through the second coil is opposite to a direction of current flowing through the first coil.
3. The camera device according to claim 1, wherein a winding direction of the first coil and a winding direction of the second coil are opposite to each other.
4. The camera device of claim 1, wherein the second coil is smaller in size than the first coil.
5. The camera apparatus according to claim 1, wherein the second coil is provided in the first coil, and
wherein the hall sensor is disposed in the first coil.
6. The camera device of claim 5, wherein the first coil includes a first opening formed in a central region, and
wherein the second coil is disposed in the first opening.
7. The camera device of claim 6, wherein the second coil includes a second opening formed in a central region, and
wherein the hall sensor is disposed at the center of the second opening.
8. The camera device of claim 1, wherein a thickness of the second coil is thinner than a thickness of the first coil.
9. The camera device of claim 1, wherein the second coil is spaced apart from the hall sensor and the first coil.
10. The camera device of claim 1, wherein the substrate comprises a flexible substrate, and
wherein the second coil includes a pattern coil formed on the flexible substrate.
11. The camera device according to claim 1, wherein the second coil overlaps the first coil and the hall sensor in a first direction, the first direction being a direction perpendicular to an optical axis of the camera device.
12. The camera device of claim 11, wherein a length of the first coil is greater than a length of the magnet in the first direction.
13. The camera device according to claim 11, wherein a thickness of the second coil is larger than a thickness of the hall sensor in a direction perpendicular to the first direction.
14. The camera device according to claim 11, wherein the second coil overlaps the magnet in a direction perpendicular to the first direction.
15. The camera device of claim 1, wherein the magnetic force of the second coil counteracts the magnetic force of the first coil such that the sensitivity of the magnetic force of the magnet detected by the hall sensor is increased.
16. A camera apparatus, comprising:
a first driving unit including one of a first coil and a magnet and disposed on the fixing member;
a second driving unit including the other of the first coil and the magnet, and provided on the movable member and facing the first driving unit;
a hall sensor facing the magnet; and
a second coil provided on one of the fixed member and the movable member,
wherein the second coil is arranged in the first coil,
wherein the Hall sensor is arranged in the second coil,
wherein the fixing member comprises a base plate,
wherein the first coil, the second coil and the Hall sensor are arranged on the substrate,
wherein the substrate includes a first region provided with the first coil and a second region provided with the second coil and the hall sensor, an
Wherein the distance between the second region and the magnet is smaller than the distance between the first region and the magnet.
17. The camera device of claim 16, wherein a direction of current flowing through the second coil is opposite to a direction of current flowing through the first coil.
18. The camera device according to claim 16, wherein a winding direction of the first coil and a winding direction of the second coil are opposite to each other.
19. The camera device of claim 16, wherein the second coil is smaller in size than the first coil.
20. The camera device of claim 16, wherein the second coil is disposed in the first coil, and
wherein the hall sensor is disposed in the first coil.
21. The camera device of claim 20, wherein the first coil includes a first opening formed in a central region, and
wherein the second coil is disposed in the first opening.
22. The camera device of claim 21, wherein the second coil includes a second opening formed in a central region, and
wherein the hall sensor is disposed at the center of the second opening.
23. The camera device of claim 16, wherein a thickness of the second coil is thinner than a thickness of the first coil.
24. The camera device of claim 16, wherein the second coil is spaced apart from the hall sensor and the first coil.
25. The camera device of claim 16, wherein the substrate comprises a flexible substrate, and
wherein the second coil includes a pattern coil formed on the flexible substrate.
26. The camera device of claim 16, wherein the second coil overlaps the first coil and the hall sensor in a first direction, the first direction being a direction perpendicular to an optical axis of the camera device.
27. The camera device of claim 26, wherein a length of the first coil is greater than a length of the magnet in the first direction.
28. The camera device of claim 26, wherein a thickness of the second coil is greater than a thickness of the hall sensor in a direction perpendicular to the first direction.
29. The camera device of claim 26, wherein the second coil overlaps the magnet in a direction perpendicular to the first direction.
30. The camera device of claim 16, wherein the magnetic force of the second coil counteracts the magnetic force of the first coil such that the sensitivity of the magnetic force of the magnet detected by the hall sensor is increased.
31. A camera apparatus, comprising:
a first coil provided on the fixing member;
a magnet provided on the movable member and facing the first coil;
a hall sensor facing the magnet; and
a second coil provided on the fixing member,
wherein the second coil is disposed adjacent to the hall sensor,
wherein the direction of the magnetic field generated by the second coil is opposite to the direction of the magnetic field generated by the first coil,
wherein the fixing member comprises a base plate,
wherein the first coil, the second coil and the Hall sensor are arranged on the substrate,
wherein the substrate includes a first region provided with the first coil and a second region provided with the second coil and the hall sensor, an
Wherein the distance between the second region and the magnet is smaller than the distance between the first region and the magnet.
32. The camera device of claim 31, wherein a direction of current flowing through the second coil is opposite to a direction of current flowing through the first coil.
33. The camera device of claim 31, wherein a winding direction of the first coil and a winding direction of the second coil are opposite to each other.
34. The camera device of claim 31, wherein the second coil is smaller in size than the first coil.
35. The camera device of claim 31, wherein the second coil is disposed in the first coil, and
wherein the hall sensor is disposed in the first coil.
36. The camera device of claim 35, wherein the first coil includes a first opening formed in a central region, and
wherein the second coil is disposed in the first opening.
37. The camera device of claim 36, wherein the second coil includes a second opening formed in a central region, and
wherein the hall sensor is disposed at the center of the second opening.
38. The camera device of claim 31, wherein a thickness of the second coil is thinner than a thickness of the first coil.
39. The camera device of claim 31, wherein the second coil is spaced apart from the hall sensor and the first coil.
40. The camera device of claim 31, wherein the substrate comprises a flexible substrate, and
wherein the second coil includes a pattern coil formed on the flexible substrate.
41. The camera device of claim 31, wherein the second coil overlaps the first coil and the hall sensor in a first direction, the first direction being a direction perpendicular to an optical axis of the camera device.
42. The camera device of claim 41, wherein a length of the first coil is greater than a length of the magnet in the first direction.
43. The camera device of claim 41, wherein a thickness of the second coil is greater than a thickness of the hall sensor in a direction perpendicular to the first direction.
44. The camera device according to claim 41, wherein the second coil overlaps the magnet in a direction perpendicular to the first direction.
45. The camera device of claim 31, wherein the magnetic force of the second coil counteracts the magnetic force of the first coil such that the sensitivity of the magnetic force of the magnet detected by the hall sensor is increased.
46. A portable terminal comprising the camera device according to any one of claims 1, 16 and 31.
CN202080043313.9A 2019-06-13 2020-06-02 Camera device Active CN113966606B (en)

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